Understand the overload of operators in detail

Kind time twenty-four hours! I ask for help from the society. As we say, I stepped on the same rake again. As well, "call of overloaded 'Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&)' is ambiguous |
, here all clear, the second variant has more parameters, than it is necessary. Something I do not understand really. Excuse for dullness.

Code:

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Rozklady_na_tsili_kvadraty &operator= ( const Rozklady_na_tsili_kvadraty &ob )
    {
      Rozklady_na_tsili_kvadraty tymtsasovyj_ob(ob);
      return tymtsasovyj_ob;
    }

---

Code:

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||=== Build: Debug in mn (compiler: GNU GCC Compiler) ===|
G:\HeloWorld\mn\mn.cpp||In member function 'Rozklady_na_tsili_kvadraty& Rozklady_na_tsili_kvadraty::operator=(const Rozklady_na_tsili_kvadraty&)':|
G:\HeloWorld\mn\mn.cpp|49|error: call of overloaded 'Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&)' is ambiguous|
G:\HeloWorld\mn\mn.cpp|41|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&)|
G:\HeloWorld\mn\mn.cpp|35|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&, int)|
G:\HeloWorld\mn\mn.cpp|49|warning: reference to local variable 'tymtsasovyj_ob' returned [-Wreturn-local-addr]|
G:\HeloWorld\mn\mn.cpp||In member function 'Rozklady_na_tsili_kvadraty& Rozklady_na_tsili_kvadraty::operator+(int)':|
G:\HeloWorld\mn\mn.cpp|55|warning: reference to local variable 'tymtsasovyj_ob' returned [-Wreturn-local-addr]|
G:\HeloWorld\mn\mn.cpp||In member function 'int Rozklady_na_tsili_kvadraty::rozdrukuj_chysla()':|
G:\HeloWorld\mn\mn.cpp|67|warning: no return statement in function returning non-void [-Wreturn-type]|
G:\HeloWorld\mn\mn.cpp||In function 'int main()':|
G:\HeloWorld\mn\mn.cpp|83|error: no match for 'operator+=' (operand types are 'Rozklady_na_tsili_kvadraty' and 'int')|
||=== Build failed: 2 error(s), 3 warning(s) (0 minute(s), 1 second(s)) ===|

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Code:

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G:\HeloWorld\mn\mn.cpp|41|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&)|
G:\HeloWorld\mn\mn.cpp|35|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&, int)|

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Lemme guess, the second one has a default value.
If so, then remove the default value from the declaration.

Also fix all the other warnings as well.

the second one has a default value - Why?


I did not understand what it could be. I, moreover, I do not understand well, how to get out of the function, temporary object.

Then I will attach the whole project, although I believed that the rest of the code is insignificant.

Constructors in general are only three, and

Code:

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Rozklady_na_tsili_kvadraty()
    {
        poraxuvaty_tsilyh_dilnykiv=0;
        mI=NULL;
        tymtsasovyj_mI=NULL;
    }

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initial initialization

Code:

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Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty &ob)
    {
      zminy_znatsennja(ob, I);
    }

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This one is intended for copying an object, and, it means, for an overloaded assignment operator

Code:

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Rozklady_na_tsili_kvadraty( const Rozklady_na_tsili_kvadraty &ob,  int _I=0)  : I(_I)
    {
      zminy_znatsennja(ob, I);
      kontsentratsija_logiki(I);
    }

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And this one is designed to add a new value .. Naturally, the number of parameters is different.

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Quote:

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Originally Posted by Dmy

And this one is designed to add a new value .. Naturally, the number of parameters is different.

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The number of parameters is different, but because you provided a default argument, both of them can be called with a single argument of the same type. Thus, it becomes ambiguous which one is intended to be called.